Hair shaft disorders are conditions that affect the structure of the hair fiber rather than the follicle itself. Hair shaft disorders can be congenital or acquired and are often classified by whether they cause fragility and breakage or only structural changes. Common examples include Trichorrhexis Nodosa, Monilethrix, and Pili Torti.
Diagnosis usually involves clinical history and microscopic examination of the hair. Treatment focuses on minimizing damage, avoiding harsh styling, and addressing any underlying causes. While some forms are genetic and persistent, proper care can improve hair strength and reduce breakage.